研究成果

学術論文

  1. H. Kato, K. Kato, S. Karube, H. Asahara, T. Kousaka, “Mechanisms of taming chaos in stick-slip vibrations of forced-self-excited mechanical systems with dry friction” Transactions of ISCIE, Vol. xx, No. x, pp. xx-xx, 2024.
  2. S. Uchino, S. Aoki, T. Kousaka, H. Asahara, “A unique bifurcation structure in one-dimensional model of current-controlled step-up DC-DC converter with photovoltaic module” Transactions of ISCIE, Vol. 36, No. 6, pp. 155-162, 2023. PDF
  3. H. Asahara, T. Kousaka, “Stability Analysis Based on Monodromy Matrix for Switched Dynamical Systems” Nonlinear Theory and Its Applications (NOLTA) IEICE, Vol. 12, No. 3, pp. 237–256, 2021.
  4. 麻原寛之，内野翔太，高坂拓司，”排熱発電用電力変換回路” システム/制御/情報, vol. 65, no. 6, pp. 213-218, 2021.
  5. S. Uchino, H. Asahara, “Analysis and Experimental Approaches for Controlling Unstable Oscillation by Changing Switching Timing in an Interrupted Electric Circuit” Journal of Signal Processing, Vol. 24, No. 4, pp. 137-140, July 2020.
  6. S. Uchino, Y. Maeda, T. Iida, H. Ohtagaki, T. Kousaka, H. Asahara, “Bifurcation Analysis in an Interrupted Dynamical System with State Dependent Input ” Transactions of ISCIE, Vol. 33, No. 1, pp. 24-30, 2020.
  7. H. Asahara, T. Kousaka, “Stability Analysis of State-Time-Dependent Nonlinear Hybrid Dynamical Systems,” IEEJ Transactions on Electrical and Electronic Engineering, Vol. 14, pp.283-288, 2019.
  8. T. Kousaka, S. Osada, H. Kato, H. Asahara, “Mathematical analysis for homoclinic bifurcation in a DC-CD converter with a photovoltaic module expressed by a piecewise-liner characteristic” IEEJ Transactions on Electrical and Electronic Engineering, Vol. 14, Isse 9, pp.1422–1433, 2019.
  9. H. Asahara, T. Kousaka, “Stability Analysis Method using Monodromy Matrix for Impacting Systems” IEICE Trans. Fundamentals, E101-A, No. 6, pp. 904-914, 2018.
  10. Y. Miino, D. Ito, H. Asahara, T. Kousaka, T. Ueta, “A General Method to Stabilize Unstable Periodic Orbits for Switched Dynamical Systems with a Periodically Moving Threshold” International Journal of Circuit Theory and Applications, Vol. 46, Issue 12, pp. 2380-2393, Dec. 2018.
  11. H. Takahashi, T. Kousaka, H. Asahara, N. Stankevich, N. Inaba, “Mixed-mode oscillation-incrementing bifurcations and a devil’s staircase from a nonautonomous, constrained Bonhoeffer–van der Pol oscillator” Progress of Theoretical and Experimental Physics, Vol. 2018, Issue 10, pp. 103A02 (16 pages), 2018.
  12. T. Kousaka, H. Asahara, N. Inaba, “Stick-slip chaos in a mechanical oscillator with dry friction” Progress of Theoretical and Experimental Physics, Vol. 2018, No. 3, pp. 033A01(11 pages), 2018.
  13. D. Ito, H. Asahara, T. Kousaka, T. Ueta, “Clock pulse modulation for ripple reduction in buck-converter circuits” Chaos, Solitons and Fractals, Vol. 111, pp. 138-145, 2018.
  14. H. Asahara, S. Banerjee, T. Kousaka, “Relationship of Fast- and Slow-Scale Instabilities in Switching Circuit with Multiple Inputs” International Journal of Circuit Theory and Applications, Vol. 45, No. 10, 1382-1396, 2017.
  15. T. Kousaka, Y. Ogura, K. Shimizu, H. Asahara, N. Inaba, “Analysis of Mixed-Mode Oscillation-Incrementing Bifurcations Generated in a Nonautonomous Constrained Bonhoeffer–van der Pol Oscillator” Physica D: Nonlinear Phenomena, Vol. 353–354, pp. 48-57, 2017.
  16. 軽部周, 麻原寛之, 高坂拓司, “振動切削系に生じるびびり振動の発生メカニズム” 電子情報通信学会論文誌, Vol. J98-A, No. 9, pp. 556-562, 2015.
    T. Hiramure, H. Asahara, T. Kousaka, “Fast- and Slow-Scale Bifurcations in an Interrupted Circuit with Multiple Inputs,” Journal of Signal Processing, Vol. 19, No. 4, pp. 95-98, 2015.
  17. 藤井太就, 麻原寛之, 伊藤大輔, 上田哲史, 高坂拓司, “区分非線形離散時間力学系に生じるBorder-collision分岐の分岐パラメータ計算法” 電気学会論文誌C, Vol.135, No.4, pp. 468-469, Apr. 2015.
  18. H. Asahara, Y. Izumi, Y. Tone, H. Matsumoto, T. Kousaka, “Effect of Time Lag in Response to Switching Signal in Interrupted Electric Circuit” Circuits, Systems and Signal Processing, vol. 33, no. 9, pp. 2695-2707, Sep. 2014.
  19. H. Asahara, T. Kousaka, “Theoretical and Experimental Analysis of a Simple PWM-1 Controlled Interrupted Electric Circuit” International Journal of Circuit Theory and Applications, Vol. 42, No. 1, pp. 53-64, January, 2014.
  20. T. Kousaka, H. Asahara, “Complete Bifurcation Analysis of a Chaotic Attractor in an Electric Circuit with Piecewise-Smooth Characteristics” IEEJ Transactions on Electrical and Electronic Engineering C, Vol. 9, No. 6, pp. 656–663, November, 2014.
  21. T. Fujii, H. Asahara, T. Kousaka, “A Simple Stability Analysis Method for Period-1 Solution in a Forced Self-Excited System with Stick-Slip Vibration” Journal of Signal Processing, vol. 18, no. 4, pp. 157-160, 2014.
  22. Y. Izumi, H. Asahara, T. Kousaka, “Basic Study of Border-Collision Bifurcation in an Electric Circuit Including Fast-Scale and Slow-Scale Dynamics” Journal of Signal Processing, Vol. 18, No. 4, pp. 153-156, 2014.
  23. 刀根佑輔, 麻原寛之, 伊藤大輔, 上田哲史, 合原一幸, 高坂拓司, “区分非線形離散時間力学系における局所的分岐点の計算法” 電気学会論文誌C, vol.134, no.5, pp. 729-736, 2014.
  24. 田中大揮, 麻原寛之, 合原一幸, 高坂拓司, “スパイクノイズを有する2次元合成力学系の定性的性質” 電気学会論文誌C, vol.133, no.7, pp. 1402-1409, 2013.
  25. 麻原寛之, 高坂拓司, “スパイクノイズの変動を考慮した断続回路の解析” 電気学会論文誌C, Vol.132 No.11, pp. 1886-1887, 2012.
  26. H. Asahara, K. Tasaki, K. Aihara, T. Kousaka, “The Stabilizing Mechanism for an Interrupted Dynamical System with Periodic Threshold” Nonlinear Theory and Its Applications (NOLTA) IEICE, Vol. 3, No.4, pp. 546-556, 2012.
  27. A. Matsuo, H. Asahara and T. Kousaka, “Chaotic Behavior in a Switching Delay Circuit” IEICE Trans. Fundamentals, Vol. E95-A, No. 8, pp. 1329-1336, 2012.
  28. A. Matsuo, H. Asahara and T. Kousaka, “Bifurcation Structure of Chaotic Attractor in a Switched Dynamical Systems with Spike Noise” Chaos, Solitons and Fractals, Vol. 45, Issue 6, pp. 795-804, 2012.
  29. 松尾彰人, 麻原寛之, 高坂拓司, “スパイクノイズを有する断続回路にみられるカオスアトラクタの実験的検証” 電気学会論文誌(C) Vol. 132-C, No. 5, pp. 811-812, 2012.
  30. T. Kousaka, H. Asahara, “An Experimental Examination of a PWM-1 Controlled Interrupted Electric Circuit” IEICE Electronics Express, Vol. 8, No. 15, pp. 1210-1214, 2011.
  31. H. Asahara, T. Kousaka, “Bifurcation Analysis in a PWM Current-Controlled H-Bridge Inverter” International Journal of Bifurcation and Chaos, Vol. 21, No. 3, pp. 985-996, 2011.
  32. H. Asahara, T. Kousaka, “Qualitative Analysis of an Interrupted Electric Circuit with Spike Noise” International Journal of Circuit Theory and Applications, Vol. 39-11, pp. 1177-1187, 2011.
  33. 麻原寛之, 鈴木匠, 高坂拓司, “スパイクノイズが状態・時刻混合型断続動作特性を有する力学系に及ぼす影響” 電子情報通信学会論文誌, Vol. J92-A,　No.9,　pp.596-603, 2009.
  34. H. Asahara, T. Kousaka, “Experimental Validation of a Hybrid Dynamical System with Switching Delay” Journal of Signal Processing, Vol. 13, No. 4, pp. 307-310, 2009.
  35. T. Kousaka, H. Asahara, “Dynamical Mechanism for Interrupted Circuit with Switching Delay” IEICE Electronics Express, Vol. 6, No. 12, pp. 806-810, 2009.

著書

  1. H. Asahara, T. Kousaka, T. Ueta, “Oscillator Circuits: Frontiers in Design, Analysis and Applications: Chapter 2 –Analysis of bifurcation in oscillatory circuits–,” The Institution of Engineering Technology, 2016. [ISBN: 978-1-78561-057-8]